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Klassen, Alexander; Forster, Vera E; Körner, Carolin . (2017). A multi-component evaporation model for beam melting processes. Modelling and Simulation in Materials Science and Engineering, 25(2), 025003–. doi:10.1088/1361-651X/aa5289 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research